Blending and Curing Procedure

Mixtures of PEI/epoxy monomer and PEI/BPACY monomer were prepared by dissolving PEI and thermoset monomers in methylene chloride at room temperature and evaporating the solvent. The epoxy monomer/PEI solution was heated on a hot plate to 140°C, and stoichiometric amounts of DDS were added while stirring for about 7 min. For the catalyzed system, 2-methyl imidazol catalyst was also added. 

The mixtures of PEI/(epoxy monomer+DDS) and PEI/BPACY monomer cured isothermally in the aluminum mold according to the schedule shown in Table 3.1. 

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